<!DOCTYPE html>
<html>
  <head>
    <title>Parcel Sandbox</title>
    <meta charset="UTF-8" />
    <style>
      html,
      body {
        height: 100%;
        margin: 0;
        padding: 0;
      }
      #app {
        width: 100%;
        height: 100%;
        position: absolute;
        left: 0;
        top: 0;
      }
      .map-wrapper {
        position: relative;
        width: 100%;
        height: 100%;
      }
      .btn {
        position: absolute;
        z-index: 99;
        top: 0;
        left: 0;
      }
    </style>
  </head>

  <body>
    <div class="map-wrapper">
      <button id="js_open" class="btn">打开框选</button>
      <div id="app"></div>
      <!-- <script src="./step_22_contextPad/index.js"></script> -->
    </div>
  </body>
</html>
